The adverb 无非 “just”
The adverb 无非 
is used to soften the meaning of what has been said. Moreover, it is used to emphasize that a situation is not that serious.
无非 is often followed by a noun used as a predicate. The copula verb 是 connects 无非 and the predicate.
is used to soften the meaning of what has been said. Moreover, it is used to emphasize that a situation is not that serious.
无非 is often followed by a noun used as a predicate. The copula verb 是 connects 无非 and the predicate.Examples
无非是个时间问题
It is just a matter of time
wúfēi shì ge shíjiān wèntí
他想要的无非是一份稳定的工作
All he needs is a stable job
tā xiǎngyào de wúfēi shì yí fèn wěndìng de gōngzuò
他这么做，无非是为了早点儿回家
He only did it to get home earlier
tā zhème zuò, wúfēi shì wèile zǎodiǎnr huí jiā